Materials used in mask making

Many different materials may be elaborated on in many different
ways. They may be used individually to create a mask or used in
combination with other materials from the list above. Inexpensive,
flexible, and easily handled materials are used to create most masks
today. Besides the above traditional mask making materials, more
options and adaptations of materials may be seen in modern masks
by using whatever medium may be easily laid hold of and found around
the house, such as paper bags, boxes, cans, aluminum foil, cloth,
cardboard, and so on. What other materials can you think of to make
your own mask? Can you think of something unique that has not been
mentioned yet? Example